Locomotive boiler



May 12, 1931. A. w. BRUCE 1,805,072

LOCOMOTIVE BOILER Original Filed Jan. 11, 1927 3 Sheets-Sheet l A. W. BRUCE LOCOMOTIVE BOILER May 12, 1931.

3 Sheets-Sheet 2 Original Filed Jan. 11, 1927 WITNESSES May 12, 1931. A. w. BRUCE LOCOMOTIVE BOILER s Sheets-Sheet 5 Original Filed Jan. 11, 1927 of the locomotiveitype proved locomotive Patented May 12, 1931 nit I ALFRED w. BRUCE, on NEW YORK, n. Y.

LOCOMOTIVE BOILER Original application filed January 11, 1927,

I I November 19, 1927. The invention is disclosed in thevpresent application, which is a division of the application filed January 11, 1927, Ser. No. 160,330. The invention relates, generally, to boilers and, specifically, to those of that type in which the sides of the re box and combustion chamber are formed of a plurality of water tubes, instances 0 which are exemplified in the patents of J. 10 M. McClellon, No. 1,580,063, April 6,1926, and Alfred IN. Bruce, No. 1,624,656, April 12, 1927. The present invention is particularly directed to theladaptation of a boiler of the type specified, for operation under comparatively high steam pressure, and to effecting a reduction of the weight and dimensions of the boiler to a substantial extent. A characteristic-feature of the invention is the application f separate circulation systends for the fire box and for the barrel of the boiler. p

' The'improvement fully set forth.

In the accompanying drawings: Figure 1 claimed is hereinafter is a vertical longitudinal central section through a boiler embodying'theinvention; Fig. 2, a plan view thereof; Fig. 8, a vertical transverse section, the-right hand'half being taken on the line III, III of Fig. 1, and the left hand halfon the line IIIa, IIIa, thereof;

Fig. 4, a similar section, the right hand half being taken on the line IV, IV ofFig. 1, and the left hand half on the line IVa, IVa, thereof ;,and, Fig. 5, a view, p'artlyin longitudinal central section and partly in elevation, illustrating the circulation of water in the boiler.

In the practice of the invention, referring descriptively to the specific embodiment thereof which is herein exemplified, the imboiler thereof comprises 5 three main sections; the fire box, A, the boiler barrel, B, through which extends a plurality of fire tubes, 36, and the smoke box, C

The mud ring, 2, of the fire box, is hollow, and forms the bottom support of a plurality of watertubes, 3, which are set closely together, forming the side walls of thefire box, and are connected, at their a drum, 4;, which extends forwardly over the fire box,

upper ends, wit horizontally and and which h tion above described, there is,

Serial No. 160,330. Divided'and this application filed Serial No. 234,346.

steam communication adjacent to its forward end, with a header, 13,,at the rear end of the barrel, B, and is open at its forward end,

which is connected to an upwardlyextending junction piece, la, having a manhole in its top, closed by a cover, pipes, 22, extend from the top of the header, 13, to the mud ring, 2, of the fire box. 7 7

A water circulation pipe, 40, leads from the lower end of the junction piece to the forward portion of the 4b. -Water circulation barrel, and a deflecting plate, 4d, extends downwardly and rearward-f ly below its opening into the barrel. A steam I (one or more)", of

receiving chamber, 46,

extends forsmaller diameter than the drum,

wardly from the upper end of the junction piece, to or near the rear of the smoke box, 0, its forward end being supported on, and fitted to slide in, a bearing, 4h, secured to the top of the smoke box, thereby providing for longitudinal expansion of the chamber, 46.

A steam collecting chamber, 4; having a plurality of perforations in its top, is located in the steam receiving chamber, 16, adjacent to its top and to its forward end.v construction, the steam is Jossible from the water, andit is delivered from the chamber, 41;, through a pipe, 419, to the throttle valve, 16, andthence, through pipes, 17, to the superheater, 18, or to the engine cylinders, as the case may be. As shown in Fig. 1, the steam delivery pipes, are connected by slip joints, to the superheater, 18, (equivalently to the cylinder direct supply pipes) so as to permit free movementof the steam delivery chamber, 40.

A diaphragm plate,

its axial plane, and extends across the same, from a vertical sheet, 23a,

to within a short distance from its front flue By this, separated as far as" 23, is located in the rear portion of the barrel, B,'adjacent to therein, through which the fire tubes,'3b, of the barrel pass,

sheet. Feed water is supplied to the barrel through a feed pipe, 23b,provided with the usual check valve, and located a short distance forward of the verticalsheet, 23a.

In'the operation of a boiler of the construcas indicated by the line having a plurality ofarrow heads,

in Fig. 5, a sing e continu s posi i ey guided circulation of water through the water spaces of the barrel and fire box, the water in the barrel being thereby constantly stirred up, instead of being comparatively undisturbed as in ordinary construct-ions. The water supplied to the barrel through the feed pipe, 23?), moves forwar lly through the Compartment thereof below the diaphragm plate, 28, to the forward portion of the barrel; thence rearwardly through the compartment of the barrel above said plate, to the header; thence downwardly through the circulation pipes, 22, to the mud ring, 13, thence, through the side water tubes, to the drum, 4, and thence, through the circulation pipe, 40, to the forward portion of the barrel. The circuit continuously repeats itself through the members stated.

The invention claimed as new and desired to be secured by Letters Patent is:

1. In a boiler of the locomotive type, the combination of a throttle valve; a fire box section the sides of which are formed of water tubes; a hollow mud ring communicating with the lower ends of. said water tubes; a cylindrical boiler shell section connected to and extending forwardly from the fire box section; a plurality of lire tubes in said cylindrical boiler shell section; a drum extending forwardly from the rear of the fire box section, said drum communicating with the'upper ends of the water tubes there of; a conduitestablishing communication between the drum and the forward portion of the cylindricalboiler shell section; means connecting the upper portion of the barrel and the mud ring to afford communication I therebetween; a steam receiving chamber with the unction fitting communicating with the forward end of the drum and eI-Itendi'ng forwardly thereof; and a steam delivery connection through which steam passes from the steam receiving cham her to the throttle valve.

2. In a. boiler, of the locomotive type, the combination of a throttle valve; a fire box section the sides of which are formed of water tubes; a hollow mud ring communicating withthe lower ends of saidwater tubes; a cylindricalboiler shell section connected to and extending for-wart ly from the fire box.

section; a plurality of fire tubes in said cylindrical boiler shell section; a drum extending forwardly from the rear of the fire box sec tion, said drum communicating with the upper ends of the water tubes thereof; a junction fittingcommunicating with the forwai l end of the drum; a conduit connecting said junction fitting with the forward portion of the cylindrical boiler shell section; a heater at the rear end "of the cylindr cal boiler shell section communicating therei -th; a conduit establishing communication between the upper portion of the header and the mud ring; a steam receiving chamber communicating and extending for wardly therefrom; a steam collecting chamber located in the steam receiving chamber and communicating therewith; and a steam delivery connection, extending from the steam collecting chamber, through the steam receiving chamber, to the throttle valve.

3. ln a boiler of the locomotive type, the combination of a throttle valve; a fire box section the sides of which are formed of water tubes; a hollow mud ring communicating with the lower ends of said water tubes; a cylindrical boiler shell section connected to and :ctending forwardly from the fire box secti n; a plurality of fire tubes in said cylindrical boiler shell section; a drum extendingforwardly from the rear of the fire box section, said drum communicating with the upper ends of the water tubes thereof; a header at the rear end of the cylindrical boiler shell section communicating therewith; a conduit connecting the upper portion of the header with the mud ring; a steam receiving chamber disposed forwardly of the drum and in open communication therewith; means for delivering steam from said chamber to the throttle valve; and a conduit communicating with the forward end of the drum and the forward end of the cylindrical boiler shell.

4. In a boiler of the locomotive type, the combination of a throttle valve; a lire box section the sides of which are formed of water tubes; a hollow mud ring communicating with the lower ends of said water tubes; a cylindrical boiler shell section connected to and extending forwardly from the fire box section; means connecting the upper portion of the boiler shell with the mud ring to of ford communication therebetween; a pluraL ity of lire tubes in said cylindrical boiler shell section; a drum extending forwardly from the rear of the fire box section, said drum communicating with the upper ends of the water tubes thereof; means connecting said drum to the shell section a steam receiving chamber rigidly connected to the forward end of said drum a d extending to the forward end of the cylindrical boiler shell section; a bearing in which the forward end of the steam receiving chamber is supported with the capacity of free movement to compensate for longitudinal expansion and contraction; and means for delivering steam from the steam receiving chamber to the throttle valve, comprising a conduit rigidly secured to said chamber.

5. In a boiler of the locomotive type, the; V

receiving chamber and having a slip joint in its length adapted to compensate for longitudinal expansion and contraction of the eonor 2' extending forwardly from the rear of the fire box, said drum communicating with the upper ends of the water tubes thereof; a ver tical sheet, fixed in the rear lower portion of the barrel, through which sheet a plurality of the fire tubes are passed; a horizontal diaphragm plate, projecting forwardly fromsaid sheet, between rows of fire tubes; a feed water connect-ion, leading into the barrel, forward of said sheet; a circulation pipe, adapted to convey water from the upper portion of the barrel to the mud ring, in rear of said sheet; and a circulation pipe, leading from the drum to the forward portion of the barrel.

6. In a boiler of the locomotive type, the combination of a throttle valve; a fire box section the sides of which are formed of water tubes; a hollow mud ring communicating with the lower ends of said water tubes; a cylindrical boiler shell section connected to and extending forwardly from the fire box section; a plurality of fire tubes in said cylindrical boiler shell section; a drum -exten ding forwardly fromthe rear of the fire box section, said drum communicating with the upper ends ofthe water tubes thereof; a conduit establishing communication between the drum and the forward portion of the cylindrical-boiler shell section; means establishing communication between the barrel and the mud ring; a steam receiving. chamber communicating with the forward end of the drum and extending forwardly thereof; a steam delivery connection through which steam passes from'the steam receiving chamber to the throttle valve a vertical partition wall disposed between theends of the cylin-' drical boiler shell section and extending from the bottom part way to the top thereof; a horizontal partition extending from the upper portion ofthe vertical partition for- 'wardly' adapted to provide communication between the shell section portions above and below the horizontal partition; and a feed water connection, leading into the shell section, forward of said vertical partition.

7. In a boiler of the locomotive type, the combination of a throttle valve; a fire box section the sides of which are formed of per ends of the water tubes thereof; a junction fitting communicating with the forward end of the drum; a conduit connecting said junction fitting with the forward portion of the cylindrical boiler shell section; a header at the rear end of the cylindrical boiler shell section communicating therewith; a conduit establishing communication between the upper portion of the header and the mud ring; a steam receiving chamber communicating with the junction fitting and extending forwardly therefrom; a steam collecting chamber located in the steam receiving chamber and'communicating therewith; a steam dellvery connection, extending from the steam collecting chamber,'through the steam rece ving chamber, to the throttle valve; a vertlcal partition wall disposed betweenthe ends of the cylindrical boiler shell section and extending from the bottom part way to the top thereof; a horizontal partition extending from the upper portion of the vertical part1- tion forwardly adapted to provide communicationbetween the shell section portions above and below the horizontal partition; and a feed water connection leading into the shell section forward of said vertical partition. I

8. In a boiler of the locomotive type, the combination of a throttle valve; a fire box sec tion the sides ofwhich are formed of water tubes a hollow mud ring communicating with the lower ends of said water tubes; a cylindrical boiler shell section connected to and extending forwardly from the firebox section; a plurality of fire tubes in said cylindrical boiler shell section; a drum extending forwardly from the rear of the fire box section, said drum communicating with. the upper ends of the water tubesthereof; a header at the rear end of the cylindrical boiler shell section communicating therewith; a conduit connecting the upper portion of theheader with the mud ring; a steam receiving chamber disposed forwardly of the drum and in open communication therewith; means for delivering steam from said chamber to the throttle valve; a'conduit communicating with the forward end of the drum and the forward end of the cylindrical boiler shell; a vertical partition wall disposed between the ends of the cylindrical boiler shell section and extending from the bottom part way to the top thereof;

a horizontal partition extending from the up- I per portion of the verticalpartition forwardly adapted to provide communication between the shell section portions above and below the hbrizontal partition; and a feed water connection leading into the shell section forward of said vertical. partition. 1

9. In a boiler of the locomotive type, the combination of a fire box section, the sides of which are formed of water tubes; a hollow mud ring communicating with the lower ends of said water tubes; a cylindrical boiler shell sectionconnected to, and extending forwardly from the fire box; a plurality of fire tubes in said boiler shell section; a drum extending forwardly from the rear of the fire box and communicating with the upper ends of the water tubes thereof; a conduit establishing communication between the forward end of the drum and the forward end of the boiler shell section; a deflector Within the boiler shell section opposite the mouth of the conduit leading into the boiler shell section, said deflector being adapted to deflect rearwardly of the boiler shell section Water delivered into the boiler shell section by said conduit; a header between the boiler shell section and the fire box section; means for establishing communication between the mud ring and the upper portion of the header; and a steam receiving chamber extending forwardly of and cornmunicatmg with the drum.

ALFRED WV. BRUCE. 

